Smelting-furnace.



No. 891,349. PATBNTED JUNE 23, 1908.

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SMELTING -FURNAGEL Ammon-Ion umn SEPT. 1a, moe. Y

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PATENTED JUNE 23, 190.8.

JQ SQLODER. SMELTING PURNAGE.'

APPLICATION FILED SEPT.1B, 1906.

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v 34mm@ attoznmo i JOHN S. LODER, OF RENO, NEVADA,

COMPANY, OF RENO,

ASSIGNOR TO THE LODER SMELTER AND REFINER NEVADA, A CORPORATION OFNEVADA.

' SMELTING-FURNACE Specification of Letters Patent.

Application filed September 18, 1906.

Patented June 23, 190,8.

serial No. 335,094.

zen of the United States, residing at Reno,

Washoe county, State of Nevada, have invented certain new and usefulImprovements in Smelting-Furnaces, of which the following is aspecification.

This' invention relates to smelting furnaces and particularly tofurnaces of the vertical shaft variety, and its object is to provide afurnace in which the ore may be reduced by a continuous operation and bymeans of heat produced by the combustion of a fuel and a gas containingoxygen without the use of hard fuels of any kind.

These objects are accomplished by a furnace and burners in connectiontherewith substantially as hereinafter described in connection with thedrawings forming part of this specificati/on, in which- Figure 1.is avertical section; Fig. 2 a side elevation, and Fig. 3 a view inelevation and part section showing on a larger scale the burner and thesurrounding part of the furnace wall. I

The furnace A is made up of the four vertical side walls 2 forming achamber much greater in length than in width, the fuel chamber havingthe upwardly diverging side walls 3, the upper walls 4, and the stack 5.The bottom of the furnace is formed by a Well 6 communicating with atrap 7 from which the bullion is ladled out as it is required. Anopening 8 is provided in one of the upper walls for charging the furnacewith the ore B.

In consequence of the narrow width of the combustion chamber and thediverging of the side walls of the ore chamber above the combustionchamber, the ore in the latter tends to jam in the space above thecombustion chamber so that it is held above the melting zone.

In the long parallel side walls 2 are openings into which extendopposing series of burners 9 to which is supplied both air and a liquidor gaseous fuel under considerable pressure and the ignited gases fromthe burners play at a very high heat against the bottom of the mass ofore causing the latter to fuse at about the point 1() in a comparativelyshort space of time.

The parts 6 and 7 constitute a trap the contents of which, being heavymolten metal, eifectually close the bottom of the combustion chamber andthe high pressure of the gases (from thirty to sixty pounds to thesquare inch) insures such a pressure in the combustion chamber that ittends to support the mass of ore above and hold the ore charge at thefusion point until fusion ensues. By this means the extent of spacerequired in the use of hard fuel, and the loss of time required to bringthe latter up to a point to fuse the ore, are avoided, and as the fusionpoint is always the same, and as the gases may be fed with regularity,there is a much more uniform action than is possible in the ordinaryfurnace when hard fuel is employed.

The burner 9 com rises the air supply tube 11 and concentricallyarranged therein, the fuell supply tube 12, these tubes respectivelybeing supplied from pressure supply pipes 13 and 14, having flexibleconnections 15 and 16 and regulating valves 17 and 18. The tube 11 andconsequently the inclosed tube 12, is arranged to be adjusted toward oraway from the center of the furnace, and this adjustment may beaccomplished by means of the lever 19 operatively connected therewith asshown in Fig. 3. The joint between the tube 11 and the furnace wall ispreferably closed by suitable packing 20.

As the exceedingly high heat produced by the combustion would bedestructive to the burner tubes, l form a water jacket 21 around each ofthe burners, having suitable inlet and outlet pipes 22 and 23respectively, best shown in Fig. 3.

The rear end of the burner is supplied with a glass covering 24 wherebya view by the operator into the combustion chamber is permitted todetermine the degree of heat produced.

lt will be readily understood from the above described arrangement thatthe burner 9 may be moved toward the center of the furnace by the lever19 to increase the heat at the point of fusion, and vice versa; alsothat the degree of heat may of course be regulated by manipulating thevalves 17 and 18, thus varying the relative quantity of airand fuel suplied to the burner. It will be further undbrstood that the regulation bythe valves 17 and 18 of the supplies of air and fuel respectively willcause an increase or decrease, as the case may be, in the pressure underthe ore, which pressure, as before stated, acts in conjunction with thesloping walls 3 to support the ore to a greater or less degree as isrequire fusion of the metal.

VVhaJt I claim is;- l. The combination With a furnace having openingsopposite the combustion chamber fuel.

urners extending into said openings and longitudinally' adjustable, airand supply pipes, and eXible connections between the said pipes and eachburner.

2. The combination `With a furnace having enings opposite the combustionchaman air pipe extending into said opentliereof, of

fuel

side o ber, o

d` to produce a, perfect ings, means for ad tudinally, a fuel p pipe andthe air pipe and t In testimony Witnesses justing the air pipe longiipeextending into the air flexible connections for supplying he fuel pipewith air and whereof I aflix my signature 1n presence of two Witnesses.

JOHN S. LODER.

E. G. CAMPBELL, M. S. NEALE.

